A comparative study on mechanical and vibroacoustic performance of sandwich cylindrical shells with positive, negative, and zero Poisson's ratio cellular cores

IF 13 1区 工程技术 Q1 ENGINEERING, MARINE
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Abstract

Deep-sea submersibles are significant mobile platforms requiring multi-functional capabilities that are strongly determined by the constituent materials. Their cylindrical protective cover can be advanced by designing their sandwiched cellular materials whose physical properties can be readily parameterized and flexibly tuned. Porous honeycomb materials are capable of possessing tuned positive, negative, or zero Poisson's ratios (PPR, NPR, and ZPR), which is expected to produce distinct physical performance when utilized as a cellular core of cylindrical shells for the deep-sea submersibles. A novel cylindrical meta-structure sandwiched with the semi-re-entrant ZPR metamaterial has been designed as well as its similarly-shaped sandwich cylindrical shell structures with PPR and NPR honeycombs. The mechanical and vibroacoustic performance of sandwich cylindrical shells with cellular materials featuring a full characteristic range of Poisson's ratios are then compared systematically to explore their potential for engineering applications on submerged pressure-resistant structures. The respective unit cells are designed to feature an equivalent load-bearing capability. Physical properties of pressure resistance, buckling, and sound insulation are simulated, respectively, and the orders of each property are then generalized by systematic comparison. The results indicate that the PPR honeycomb core takes advantage of higher structural strength and stability while the ZPR one yields better energy absorption and sound insulation behavior. The NPR one yields moderate properties and has the potential for lower circumferential deformation. The work explores the application of cellular materials with varied Poisson's ratios and provides guidance for the multi-functional design of sandwich cylindrical meta-structures.

正、负、零泊松比蜂窝芯夹层圆柱壳力学与振动声学性能的比较研究
深海潜水器是重要的移动平台,需要多功能能力,而这些能力在很大程度上取决于组成材料。通过设计其夹层蜂窝材料,其物理性质可随时进行参数化和灵活调整,从而提高其圆柱形保护罩的性能。多孔蜂窝材料能够具有可调的正泊松比、负泊松比或零泊松比(PPR、NPR 和 ZPR),当用作深海潜水器圆柱形外壳的蜂窝核心时,有望产生与众不同的物理性能。我们设计了一种夹有半后向 ZPR 超材料的新型圆柱形超材料结构,以及带有 PPR 和 NPR 蜂窝的类似形状的夹层圆柱形外壳结构。然后系统地比较了具有泊松比全特性范围的蜂窝材料的夹层圆柱壳的机械和振动声学性能,以探索它们在水下抗压结构上的工程应用潜力。各单元材料均设计成具有同等承载能力。分别模拟了抗压、屈曲和隔音的物理特性,然后通过系统比较归纳了每种特性的阶次。结果表明,PPR 蜂窝芯材具有更高的结构强度和稳定性,而 ZPR 蜂窝芯材则具有更好的能量吸收和隔音性能。NPR 型蜂窝芯性能适中,圆周变形较小。这项研究探索了不同泊松比蜂窝材料的应用,为夹层圆柱形元结构的多功能设计提供了指导。
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来源期刊
CiteScore
11.50
自引率
19.70%
发文量
224
审稿时长
29 days
期刊介绍: The Journal of Ocean Engineering and Science (JOES) serves as a platform for disseminating original research and advancements in the realm of ocean engineering and science. JOES encourages the submission of papers covering various aspects of ocean engineering and science.
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